The 6551 from Ophir RF is a RF Amplifier with Frequency 6 to 18 GHz, Gain 35 dB, Noise Figure 35 dB, Output Power 46.98 dBm, Output Power 50 W. Tags: Benchtop / Rackmount, Travelling Wave Tube Amplifier, Power Amplifier. More details for 6551 can be seen below.